Study of suppressing method ring wave interference of intelligent circuit breaker

To improve electromagnetic performance of the intelligent circuit breaker, it is needed to analyze interference source performance and take necessary method of interference suppression. In order to predict the electromagnetic compatibility performance of smart circuit breaker by simulation, it is important to establish the simulation model of interference source generator of ring wave. Based on the analysis of generation mechanism of ring wave, the transfer function and equivalent circuit model of it are established. With analyzing of ring wave spectrum, a design method of active low pass filter to resist the ring wave interference is proposed. The simulation results show that the proposed method can suppress the interference of ring wave effectively, which is favorable to satisfy the electromagnetic compatibility design demands of the intelligent circuit breaker.